1 # This testcase is part of GDB, the GNU debugger.
3 # Copyright 2009, 2010, 2011 Free Software Foundation, Inc.
5 # This program is free software; you can redistribute it and/or modify
6 # it under the terms of the GNU General Public License as published by
7 # the Free Software Foundation; either version 3 of the License, or
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10 # This program is distributed in the hope that it will be useful,
11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 # GNU General Public License for more details.
15 # You should have received a copy of the GNU General Public License
16 # along with this program. If not, see <http://www.gnu.org/licenses/>.
18 # Check that watchpoints get propagated to all existing threads when the
19 # watchpoint is created.
29 # This test verifies that a watchpoint is detected in the proper thread
30 # so the test is only meaningful on a system with hardware watchpoints.
31 if [target_info exists gdb,no_hardware_watchpoints] {
35 set testfile "watchthreads2"
36 set srcfile ${testfile}.c
37 set binfile ${objdir}/${subdir}/${testfile}
38 if {[gdb_compile_pthreads "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable [list debug "incdir=${objdir}" "additional_flags=-DNR_THREADS=$NR_THREADS -DX_INCR_COUNT=$X_INCR_COUNT"]] != "" } {
44 gdb_reinitialize_dir $srcdir/$subdir
47 gdb_test_no_output "set can-use-hw-watchpoints 1" ""
50 # Run to `main' where we begin our tests.
53 if ![runto_main] then {
57 gdb_test "break thread_started" \
58 "Breakpoint 2 at .*: file .*${srcfile}, line .*" \
59 "breakpoint on thread_started"
61 # Run the program until all threads have hit thread_started.
62 # We use this as the vehicle to determine when gdb is aware
63 # of all threads (i.e. "info threads" would show all threads).
66 set message "run to thread_started"
67 for { set i 0 } { $i < $NR_THREADS } { incr i } {
68 gdb_test_multiple "continue" $message {
69 -re ".*Breakpoint 2, thread_started ().*$gdb_prompt $" {
77 if { $nr_started == $NR_THREADS } {
78 pass "all threads started"
80 fail "all threads started"
81 # No point in continuing.
85 # Watch X, it will be modified by all threads.
86 # We want this watchpoint to be set *after* all threads are running.
87 gdb_test "watch x" "Hardware watchpoint 3: x"
89 # Now that the watchpoint is set, we can let the threads increment X.
90 gdb_test_no_output "set var test_ready = 1"
93 #gdb_test_no_output "set debug infrun 1"
95 set x_inc_line [gdb_get_line_number "X increment"]
96 set x_thread_loc "thread_function \\\(arg=.*\\\) at .*watchthreads.c:$x_inc_line"
98 # X is incremented under a mutex, so we should get NR_THREADS * X_INCR_COUNT
100 set limit [expr $NR_THREADS*$X_INCR_COUNT]
104 set message "x watch loop"
106 for {set i 0} {!$done && $i < $limit} {incr i} {
109 gdb_test_multiple "continue" $message {
110 -re "(.*Hardware watchpoint.*)$gdb_prompt $" {
111 set string $expect_out(1,string)
113 if [regexp "Hardware watchpoint 3: x\[^\r\]*\r\[^\r\]*\r\[^\r\]*Old value = $x_count\[^\r\]*\r\[^\r\]*New value = [expr $x_count+1]\r" $string] {
117 # We test for new value = old value + 1 each iteration.
118 # This can fail due to gdb/10116.
119 # This is caught after the loop exits.
122 -re "The program is not being run.*$gdb_prompt $" {
123 fail "$message (program terminated)"
127 # If we fail above, don't bother continuing loop.
128 if { $test_flag == 0 } {
133 if { $i == $limit } {
134 pass "all threads incremented x"
136 kfail "gdb/10116" "gdb can drop watchpoints in multithreaded app"